﻿#region " LICENSE "
// DRILL - Dependency Resolution Interface Layer Library
// Copyright (c) 2008-2012 Wade A. Reynolds. All rights reserved.
// http://drill.codeplex.com/
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#endregion
using System;
using System.Web;
using Drill.Integration.Web.Mocks;
using Drill.LocatorPattern;
using NUnit.Framework;

namespace Drill.Integration.Web
{
	[TestFixture]
	public class HttpContextLocatorTests
	{
		[Test]
		public void CanConstructUsingParameterlessConstructor()
		{
			 // Arrange
			// Nothing to arrange.

			// Act
			ILocator<HttpContextBase> locator = new HttpContextLocator();

			// Assert
			Assert.That(locator, Is.Not.Null);
		}

		[Test]
		public void CanConstructUsingConstructorWithHttpContextBaseArgument()
		{
			// Arrange
			HttpContextBase httpContext = new HttpContextMock();

			// Act
			ILocator<HttpContextBase> locator = new HttpContextLocator(httpContext);

			// Assert
			Assert.That(locator, Is.Not.Null);
		}

		[Test]
		public void CanConstructUsingConstructorWithNullHttpContextBaseArgument()
		{
			// Arrange
			HttpContextBase httpContext = null;

			// Act
			// ReSharper disable ExpressionIsAlwaysNull
			ILocator<HttpContextBase> locator = new HttpContextLocator(httpContext);
			// ReSharper restore ExpressionIsAlwaysNull

			// Assert
			Assert.That(locator, Is.Not.Null);
		}

		[Test]
		public void CanLocateInstanceUsingConstructorWithHttpContextBaseArgument()
		{
			// Arrange
			HttpContextBase httpContext = new HttpContextMock();
			ILocator<HttpContextBase> locator = new HttpContextLocator(httpContext);

			// Act
			var itemUnderTest = locator.Locate();

			// Assert
			Assert.That(itemUnderTest, Is.Not.Null);
			Assert.That(itemUnderTest, Is.SameAs(httpContext));
		}

		[Test]
		public void CanLocateNullInstanceUsingParameterlessConstructorAndNotInAspNetWebApp()
		{
			// Arrange
			ILocator<HttpContextBase> locator = new HttpContextLocator();

			// Act
			var itemUnderTest = locator.Locate();

			// Assert
			Assert.That(itemUnderTest, Is.Null);
		}

		[Test]
		public void CanDisposeUsingParameterlessConstructor()
		{
			// Arrange
			ILocator<HttpContextBase> locator = new HttpContextLocator();

			// Act
			locator.Dispose();

			// Assert
			// Nothing to assert. No exceptions should be thrown.
		}

		[Test]
		public void CanDisposeUsingConstructorWithHttpContextBaseArgument()
		{
			// Arrange
			HttpContextBase httpContext = new HttpContextMock();
			ILocator<HttpContextBase> locator = new HttpContextLocator(httpContext);

			// Act
			locator.Dispose();

			// Assert
			// Nothing to assert. No exceptions should be thrown.
		}

		[ExpectedException(typeof(ObjectDisposedException), ExpectedMessage = "instance has been disposed", MatchType = MessageMatch.Contains)]
		[Test]
		public void CannotLocateInstanceAfterDispose()
		{
			// Arrange
			ILocator<HttpContextBase> locator = new HttpContextLocator();

			// Act
			locator.Dispose();
			locator.Locate();

			// Assert
			// Nothing to assert because the test should throw an expected exception (see ExpectedException attribute).
		}
	}
}